Language selection


My Weather Profile Weather Topics  | 

Johnstone Strait


Marine Forecast

Issued 04:00 PM PDT 20 August 2019

Tonight and Wednesday.

Gale warning in effect.

Wind southeast 15 to 25 knots increasing to southeast 25 to 35 near midnight then diminishing to variable 15 to 25 early Wednesday morning. Wind becoming northwest 15 to 25 near noon Wednesday.

Rain beginning this evening and ending near noon Wednesday.

Extended Forecast

Issued 04:00 PM PDT 20 August 2019
Thursday Wind northwest 10 to 20 knots diminishing to light in the morning.
Friday Wind southeast 10 to 20 knots.
Saturday Wind northwest 5 to 15 knots.

Stay connected


Weather Conditions

Skip Image

Zoom-in to make a selection

Map of Pacific - South Coast marine weather areas South Nomad - 46036 Sentry Shoal - 46131 South Brooks - 46132 Halibut Bank - 46146 South Moresby - 46147 South Hecate Strait - 46185 West Sea Otter - 46204 La Perouse Bank - 46206 East Dellwood - 46207 Discovery Island Esquimalt Harbour Kelp Reefs Malahat Race Rocks Lightstation Saturna Island Sheringham Point University of Victoria Victoria Gonzales Victoria Int'l Airport Ballenas Islands Campbell River Airport Comox Airport Entrance Island Fanny Island Nanaimo Airport Port Hardy Airport Sisters Islets Estevan Point Port Alberni Sartine Island Solander Island Tofino Airport Grief Point Howe Sound - Pam Rocks Powell River Airport Sechelt Squamish Airport Cape St.James Bella Bella Airport Bella Coola Airport Cathedral Point Herbert Island Point Atkinson Sand Heads Lightstation Tsawwassen Ferry Terminal Vancouver Int'l Airport Vancouver Harbour West Vancouver
Ice Conditions

There is no ice forecast issued for this area.


Warnings (In effect)

Gale warning in effect

Johnstone Strait

Issued 4:00 PM PDT 20 August 2019

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.


Technical Marine Synopsis

Issued 4:00 PM PDT 20 August 2019 Tonight and Wednesday At 4:00 p.m. PDT today frontal system located on a line north-south
over eastern Bowie.
By 4:00 a.m. PDT Wednesday frontal system located on a line
north-south over northern Vancouver Island.

At 4:00 p.m. PDT today low 985 mb located over northern Bowie.
By 8:00 a.m. PDT Wednesday departing low 995 mb located over the
North Coast.

At 4:00 a.m. PDT Wednesday building ridge located west of the
offshore waters.
By 5:00 p.m. PDT Wednesday building ridge located over the offshore

Marine Weather Statement

Issued 3:59 PM PDT 20 August 2019 The centre of a low pressure system west of Haida Gwaii late this
afternoon will cross Haida Gwaii tonight then cross the north
Coast into the BC Interior on Wednesday morning. The associated front
will swing through the northern and central waters tonight and
Progress across the South Coast overnight and Wednesday morning.

Within the vicinity of the low centre, storm to gale force southeast
winds ahead of it will switch to storm to gale force northwest winds
in its wake. Affected marine regions include the northern and
Central waters.

Gale to storm force southeast winds will accompany the associated
front. The front will weaken to gale to strong southeast winds as it
moves through the South Coast overnight and Wednesday morning.
Strong northwest winds are expected to follow the passage the front.

A ridge of high pressure will build Wednesday after the entire
System moves out of the marine regions. Widespread moderate to
Strong northwest winds are expected for all marine regions except
gale force winds along parts of the west coast of Vancouver Island.

Pacific - South Coast Area

Another Region

What we are doing

Date modified: